CN112791559B

CN112791559B - System for waste water zero release of refuse burning power plant whole factory

Info

Publication number: CN112791559B
Application number: CN202110080465.2A
Authority: CN
Inventors: 赵博; 李敬东; 黄国炜; 周伟; 陈小利; 陈洪剑; 张权
Original assignee: Zhejiang Tuna Environmental Science and Technology Co Ltd
Current assignee: Zhejiang Tuna Environmental Science and Technology Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-10-14
Anticipated expiration: 2041-01-21
Also published as: CN112791559A

Abstract

The invention discloses a system for zero discharge of waste water of a whole plant of a waste incineration power plant, which relates to the technical field of treatment of landfill leachate, and adopts the technical scheme that: comprises a percolate storage system, a pulping system, a reaction system and a dust removal system; the leachate storage system comprises a leachate storage tank; the pulping system comprises a pulp storage tank; reaction system includes reaction tower and rotary atomizer, the inside of reaction tower is stretched into to rotary atomizer's injection end, rotary atomizer's entry end is passed through the thick liquid pipe and is connected with the slurry storage tank, dust pelletizing system includes the sack cleaner, the flue gas outlet UNICOM of tobacco pipe and reaction tower is passed through to the entrance point of sack cleaner. The concentrated leachate solution of the waste incineration power plant is applied to a subsequent flue gas purification treatment system, and the leachate is subjected to heating evaporation treatment through high-temperature flue gas, so that the zero discharge of waste water of the whole waste incineration power plant is realized.

Description

System for waste water zero release of waste incineration power plant whole factory

Technical Field

The invention relates to the technical field of garbage leachate treatment, in particular to a system for zero discharge of wastewater of a whole plant of a garbage incineration power plant.

Background

At present, municipal refuse treatment begins to go on through the mode of msw incineration power generation, can burn on the one hand and generate heat and obtain partly electric energy, and on the other hand can also reduce the volume of rubbish greatly through burning, utilizes subsequent landfill, reaches to burn completely even idealistically and need not the landfill, has better treatment effect for traditional direct landfill mode.

The water content and the organic component content of the municipal solid waste are high, and in the process of carrying out waste incineration power generation treatment, the organic components in the waste pile are subjected to complex organic degradation and are gathered with the water in the waste pile to form a large amount of percolate. The landfill leachate has high ammonia nitrogen content, chemical oxygen demand and various toxic and harmful components, contains a large amount of organic components and toxic and harmful impurities, and can be discharged in the environment only after being further treated to reach the standard. After the leachate of the partial waste incineration power plant is treated by the traditional waste water treatment system, 15% -30% of leachate concentrated water is generated, the part of wastewater needs to be discharged outside the plant, the natural environment is still polluted and damaged greatly, and the treatment of the part of leachate becomes pain points and difficulties in the waste treatment industry.

The Chinese patent application with the publication number of CN 1103970940A discloses a process for treating landfill leachate by high-temperature incineration, which comprises a preheating system, an evaporative crystallization system, a phase-change heat storage system and an incineration system, and is characterized in that the process comprises a starting stage S1, a feeding stage S2 and a circulating stage S3, a large amount of latent heat and sensible heat in evaporative moisture discharged by evaporation are recovered by the combination of phase-change heat storage and sensible heat storage, and the recovered heat energy is continuously returned to the system for treating the leachate, so that the effect of heat recovery and utilization in the whole treatment process can be improved. However, in the treatment process of the percolate, the percolate needs to be additionally heated and incinerated by an incinerator, and the incineration process generates large incineration pollution and energy consumption.

Therefore, a new solution is needed to solve this problem.

Disclosure of Invention

The present invention aims to solve the above problems and provide a system for realizing zero wastewater discharge from a whole plant of a waste incineration power plant, wherein a concentrated leachate solution is applied to a subsequent flue gas purification treatment system of the waste incineration power plant, and the leachate is heated and evaporated by high temperature flue gas, so as to achieve zero wastewater discharge from the whole plant of the waste incineration power plant.

The technical purpose of the invention is realized by the following technical scheme: a waste water zero discharge system of a whole plant of a waste incineration power plant comprises a percolate storage system, a pulping system, a reaction system and a dust removal system; the percolate storage system comprises a percolate storage tank; the pulping system comprises a pulp storage tank; reaction system includes reaction tower and rotary atomizer, the inside of reaction tower is stretched into to the injection end of rotary atomizer, the entry end of rotary atomizer passes through the thick liquid pipe and is connected with the pulp storage tank, dust pelletizing system includes the sack cleaner, the entrance point of sack cleaner passes through the exhanst gas outlet UNICOM of tobacco pipe with the reaction tower.

The invention is further arranged in that a percolate pipe is connected to the percolate storage tank, a percolate pumping device is arranged on the percolate pipe, and the percolate pumping device comprises a percolate delivery pump.

The invention is further set that the pulping system also comprises a pulping powder bin and a pulping tank, the pulping tank is communicated with the percolate storage tank through a percolate pipe, the pulp storage tank is communicated with the pulping tank, the pulping tank is connected with a pulp pipe, a lime pulp pumping device is arranged on the pulp pipe, the lime pulp pumping device comprises at least two lime pulp pumps which are connected in parallel, and stirring paddles are arranged in the pulping tank and the pulp storage tank.

The invention is further arranged in such a way that the top of the reaction tower is provided with a flue gas inlet, the lower part of the reaction tower is provided with a flue gas outlet, and the bottom of the reaction tower is connected with an emptying pipe.

The invention is further provided that the atomization rotator is arranged at the top of the reaction tower, the rotating speed of the rotary atomizer is 13500rpm, and the atomized particle size is 20-50 μm.

The invention is further provided that the inner cavity of the reaction tower is provided with a spraying device which is communicated with the percolate storage tank through a percolate pipe.

The invention is further provided with two groups of absorbent injection systems, wherein the two groups of absorbent injection systems are both communicated with the smoke pipe and are respectively used for injecting the activated carbon and the slaked lime into the smoke pipe.

The invention is further set that the two groups of absorbent injection systems respectively comprise an injection device, an injection pipe, an injection fan and an injection storage bin, one end of the injection pipe is connected with the smoke pipe, the other end of the injection pipe is connected with the injection fan, the injection device is connected into the injection pipe, and the injection storage bin is communicated with the injection pipe through the injection device.

The invention is further set up in that the injection device comprises an outer pipe, a necking pipe and a material pipe, wherein the two ends of the outer pipe are connected with the injection pipe, the necking pipe is of a structure with large two ends and small middle, the outer diameters of the two ends of the necking pipe are consistent with the inner diameter of the outer pipe and is arranged in the outer pipe, an annular injection cavity is formed between the outer wall of the middle section of the necking pipe and the inner wall of the outer pipe, and the pipe wall in the middle of the necking pipe is provided with an injection hole; the position of the outer pipe corresponding to the injection cavity is connected with a material pipe, and the other end of the material pipe is connected with the injection storage bin.

The invention is further set that the injection device also comprises a balance pipe, the balance pipe is arranged in the outer pipe through a support, one end of the balance pipe extends into the inner cavity of the necking section of the necking pipe, the other end of the balance pipe extends to the air inlet end of the injection fan, two ends of the balance pipe are both provided with balance holes, and the balance pipe is provided with a first adjusting valve.

In conclusion, the invention has the following beneficial effects: the concentrated leachate water is supplied to a pulping system through a leachate storage system for pulping, process water is not consumed, the prepared slaked lime slurry is atomized to form slurry fog drops, the slurry fog drops are sprayed into a reaction system, water in the slurry is dried through the high temperature of smoke in the reaction system to form solid particles, slaked lime and an active carbon absorbent are sprayed through a spraying system, impurities such as acid pollution in the dried smoke are neutralized and adsorbed, the dry smoke is filtered through a dust removal system to finally obtain clean tail gas, the leachate is completely evaporated, acidic substances in the smoke are removed, and zero discharge of waste water in a whole plant of a refuse incineration power plant is realized.

Drawings

FIG. 1 is a schematic structural diagram of a method for zero discharge of wastewater from a whole waste incineration power plant according to the present invention;

fig. 2 is a schematic structural diagram of a spraying device of the spraying system of the invention.

Reference numerals are as follows: 1. rotating the atomizer; 2. a reaction tower; 3. a pulping powder bin; 4. a pulping tank; 5. a slurry storage tank; 6. a lime slurry pump; 7. a percolate storage tank; 8. a percolate conveying pump; 9. a bag-type dust collector; 10. activated carbon injection storage; 11. an activated carbon injection fan; 12. an activated carbon injection device; 13. slaked lime injection storage; 14. a slaked lime injection fan; 15. a slaked lime injection device; 16. an induced draft fan; 17. a chimney; 18. a spraying device; 19. a percolate tube; 20. a slurry pipe; 21. a smoke pipe; 22. an injection pipe; 200. a second regulating valve; 201. an outer tube; 202. a necking pipe; 203. an ejection chamber; 204. a material pipe; 205. an injection hole; 206. a balance tube; 207. a balance hole; 208. adjusting a valve I; 209. and (4) branch pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

The embodiment discloses a waste water zero discharge system of a whole plant of a waste incineration power plant, please refer to fig. 1 and fig. 2, which includes a leachate storage system, a pulping system, a reaction system, a dust removal system and an absorbent injection system, wherein leachate concentrated water is supplied to the pulping system through the leachate storage system for pulping without consuming process water, the prepared slaked lime slurry is atomized to form slurry fog drops, the slurry fog drops are sprayed to the reaction system, water in the slurry is dried through high temperature of flue gas in the reaction system to form solid particles, slaked lime and an active carbon absorbent are injected through the injection system to neutralize and absorb impurities such as acid pollution in the dried flue gas, clean tail gas is finally obtained through filtering through the dust removal system, the leachate is completely evaporated, and acid substances in the flue gas are removed, so that the waste water zero discharge of the whole plant of the waste incineration power plant is realized.

The percolate storage system comprises a percolate storage tank 7, a percolate pipe 19 is connected to the percolate storage tank 7, a percolate pumping device is arranged on the percolate pipe 19 and comprises at least two percolate conveying pumps 8 connected in parallel, and the two percolate conveying pumps 8 can ensure the stable pumping of percolate and ensure the continuous and stable operation of equipment;

the pulping system comprises a pulping powder bin 3, a pulping tank 4 and a pulp storage tank 5, wherein the pulping powder bin 3 can store slaked lime and is periodically conveyed into the pulping powder bin 3 through a vehicle; the slurry powder bin and the slurry making tank 4 are connected through a spiral feeder for conveying; the pulping tank 4 is communicated with the percolate storage tank 7 through a percolate pipe 19, percolate can be conveyed into the pulping tank 4 through the pumping of the percolate conveying pump 8 to replace process water which is originally required to be used, and the slaked lime slurry with the concentration of 10-20% is formed through stirring by the stirring slurry in the pulping tank 4;

the pulping tank 4 and the pulp storage tank 5 are protected from corrosion by carbon steel lining glass flakes, and the stirring pulp is protected from corrosion by carbon steel lining rubber.

The pulp storage tank 5 is communicated with the pulping tank 4, the pulp flows into the pulp storage tank 5 through the self weight of the pulp to be stored, and the pulp storage tank 5 is also provided with a stirring paddle, so that the pulp can be kept uniform and stable through stirring; the slurry making tank 4 is connected with a slurry pipe 20, a lime slurry pumping device is installed on the slurry pipe 20, the slurry pipe 20 is corrosion-resistant by adopting carbon steel lining rubber, the lime slurry pumping device adopts two lime slurry pumps 6 which are connected in parallel, impellers of the lime slurry pumps 6 adopt high-chromium alloy, the two lime slurry pumps 6 can work respectively, and the lime slurry can be transported stably and reliably.

The reaction system is mainly used for contact reaction of high-temperature flue gas and lime slurry, and mainly comprises a reaction tower 2 and a rotary atomizer 1, wherein the top of the reaction tower 2 is provided with a flue gas inlet, the lower part of the reaction tower 2 is provided with a flue gas outlet, and the flue gas forms upward and downward circulation in the reaction tower 2; the bottom of the reaction tower 2 is connected with an emptying pipe, and the emptying pipe continuously operates when the equipment operates, so that accumulated liquid and dust possibly remained at the bottom of the reaction tower 2 are discharged, and the maintenance and the cleaning are facilitated.

The inlet end of the rotary atomizer 1 is connected with a slurry pipe 20 and is also communicated with a percolate storage tank 7 through a percolate pipe 19, the slurry pipe 20 can convey lime slurry to the atomization rotator, the contact part of the rotary atomizer 1 and the slurry adopts Hastelloy alloy for corrosion prevention, and a certain amount of percolate is added through the percolate pipe 19 according to the running condition of the atomization rotator and the thickening condition of the lime slurry, so that stable atomization of the lime slurry is ensured; the atomizing rotator can rotate at high speed, slurry is stretched into a film or drawn into filaments under the action of centrifugal force, the thin film or the filaments are broken and dispersed into droplets at the edge of the atomizing disc, the rotating speed of the atomizer is 13500rpm, and the atomized particle size is 20-50 microns.

The rotary atomizer 1 is arranged at the top of the reaction tower 2, the spraying end of the rotary atomizer extends into the reaction tower 2, atomized liquid drops can be sprayed into the reaction tower 2 and are contacted with high-temperature flue gas, percolate in the lime slurry liquid drops can be completely evaporated under the action of high temperature, and acidic substances in the flue gas are neutralized by the lime slurry and are dried to form solid particles.

In order to facilitate the regulation of the reaction condition in the reaction tower 2, the spraying device 18 is installed in the middle of the inner cavity of the reaction tower 2, the spraying device 18 can be a plurality of nozzles, the spraying device 18 is communicated with a percolate storage tank 7 through a percolate pipe 19, a filter, a valve and other accessory equipment are installed, certain percolate can be sprayed in the reaction tower 2 through a pumping way, the flue gas can be sprayed, the reaction temperature in the reaction tower 2 can be regulated, the proper spraying can be carried out when the temperature is higher, and the drying treatment of the percolate is accelerated.

The dust removal system comprises bag-type dust collectors 9, a plurality of groups of bag-type dust collectors 9 are connected and combined to form the dust removal system according to the dust removal requirement, the inlet ends of the bag-type dust collectors 9 are communicated with the smoke outlets of the reaction tower 2 through smoke pipes 21, the outlet ends of the bag-type dust collectors 9 are communicated with a chimney 17 through an induced draft fan 16, and the cleaned tail gas is discharged.

The waste water zero discharge system also comprises two groups of absorbent injection systems, wherein the two groups of absorbent injection systems are connected to the smoke tube 21 and are respectively used for injecting activated carbon and slaked lime into the smoke tube 21, possible acidic pollutants in the smoke tube 21 can be absorbed and neutralized through slaked lime powder, and the activated carbon powder can absorb pollutants such as peculiar smell, small particle impurities, dust and the like in the smoke and is attached to and absorbed on the activated powder, so that the subsequent cloth bag dust removal is facilitated;

the active carbon has a large specific surface area, and when the active carbon is sprayed and adsorbed, the pollutants and the slaked lime powder can be adsorbed on the surface of active carbon particles, so that the pollutants in the slaked lime powder and the flue gas can be supplied to a larger and more stable contact reaction area, the adsorption and neutralization of the slaked lime powder on the impurities such as acid pollutants in the pollutants are improved, and the effect of accelerating the reaction absorption efficiency is achieved.

The two groups of absorbent injection systems respectively comprise an injection device, an injection pipe 22, an injection fan and an injection storage bin, the two groups of absorbent injection systems are respectively a slaked lime injection system and an active carbon injection system according to different injection objects of the two groups of absorbent injection systems, the slaked lime injection system comprises a slaked lime injection device 15, a slaked lime injection pipe 22, a slaked lime injection fan 14 and a slaked lime injection storage bin 13, and the active carbon injection system comprises an active carbon injection device 12, an active carbon injection pipe 22, an active carbon injection fan 11 and an active carbon injection storage bin 10.

The two groups of injection systems have basically the same structure, one end of the injection pipe 22 is connected with the smoke pipe 21, the other end of the injection pipe is connected with the injection fan, the injection device is connected into the injection pipe 22, the injection storage bin is communicated with the injection pipe 22 through the injection device, the injection device is a Venturi injection structure, and the absorbent is mixed into the airflow of the injection pipe 22 through Venturi effect adsorption and is injected;

the injection device specifically comprises an outer pipe 201, a reducing pipe 202 and a material pipe 204, wherein the two ends of the outer pipe 201 are connected with the injection pipes 22, the reducing pipe 202 is of a structure with two large ends and a small middle, the outer diameters of the two ends of the reducing pipe 202 are consistent with the inner diameter of the outer pipe 201, and the reducing pipe is arranged inside the outer pipe 201, so that an annular injection cavity 203 is formed between the outer wall of the middle section of the reducing pipe 202 and the inner wall of the outer pipe 201, and the narrow pipe wall in the middle of the reducing pipe 202 is provided with an injection hole 205 which is communicated with the injection cavity 203 and the inner cavity of the reducing pipe 202; a material pipe 204 is connected to the position of the outer pipe 201 corresponding to the injection cavity 203, and the other end of the material pipe 204 is connected with the injection storage bin; when the airflow of the injection fan flows through the outer pipe 201 and the throat pipe 202, because the caliber of the throat pipe 202 is reduced, a venturi effect is generated at the throat pipe 202, the flow rate of the flue gas at the throat section of the throat pipe 202 is increased, the pressure is reduced, the absorbent enters the throat pipe 202 from the injection storage bin along the material pipe 204, the injection cavity 203 and the injection holes 205 through negative pressure, and then enters the smoke pipe 21 to perform contact reaction with the flue gas in the smoke pipe 21 along with the circulation of the airflow of the injection fan.

In order to adjust the adsorption injection amount of the absorbent, a balance pipe 206 is arranged in the venturi mechanism, the balance pipe 206 is mounted in the outer pipe 201 through a bracket, one end of the balance pipe 206 extends into the inner cavity of the throat section of the throat pipe 202, the other end extends towards the air inlet end of the injection fan, and balance holes 207 are formed in the side walls of the two ends of the balance pipe 206, so that when the venturi mechanism generates a venturi effect, the airflow velocity at the two ends of the balance pipe 206 has a certain difference to form a pressure difference, a part of the airflow circulates through the balance pipe 206 and enters the throat pipe 202, the pressure balance can be adjusted in the balance pipe 206, the balance pipe 206 in the throat pipe 202 can eject the balance airflow outwards to generate opposite impact with absorbent powder ejected from the injection hole 205, and contact mixing between the balance pipe 206 and the absorbent powder is intensified;

the first adjusting valve 208 can be installed on the balance pipe 206, and the first adjusting valve 208 can adjust the flow of the balance pipe 206 and adjust the pressure balancing effect of the balance pipe 206, so as to adjust the proportion of the amount of the flue gas and the material absorbed by the venturi effect in the throat pipe 202.

In order to further increase the balance effect of the balance pipe 206, a branch pipe 209 can be connected to the middle section of the balance pipe 206, the branch pipe 209 is communicated with an external pressure air source, a second regulating valve 200 is mounted on the branch pipe 209 to regulate and control the flow of the branch pipe 209, so that the supplementary pressure in the balance pipe 206 can be further increased, the internal pressure of the balance pipe 206 can be increased or negative pressure can be regulated, and under the condition that the first regulating valve 208 is closed, the pressure control of the balance pipe 206 in the necking pipe 202 can be actively regulated through the branch pipe 209, so that the absorbent sprayed in the spraying hole 205 can be regulated, and the material spraying condition of a venturi structure can be increased; in order to avoid the absorbent from entering the balance pipe 206 by mistake, a filter screen may be disposed on the balance hole 207 to block the absorbent particles, and high-pressure gas is periodically introduced into the balance pipe 206 to blow off and remove the absorbent particles attached to the filter screen, thereby maintaining the smoothness of the balance hole 207.

The concentrated leachate water is recycled, so that process water required in flue gas treatment is saved, lime slurry is prepared, the leachate is completely evaporated by adopting the processes of rotary atomization, a semi-dry method, cloth bag dust removal and the like, the solidified pollutants are absorbed, neutralized and removed by an absorbent and captured and collected by a subsequent cloth bag dust remover 9, relatively clean tail gas is obtained, and the zero emission of the wastewater of the whole plant of the waste incineration power plant is realized.

Example two

The embodiment discloses a method for zero discharge of waste water of a whole waste incineration power plant, which is implemented by adopting a waste water zero discharge system of the whole waste incineration power plant in the first embodiment and comprises the following steps:

s1, performing reverse osmosis, namely performing wastewater treatment on the landfill leachate, performing osmosis through a DTRO reverse osmosis membrane to obtain leachate concentrated water with the raw water mass of 15-30%, and storing the obtained leachate concentrated water in a leachate storage tank 7;

s2, in the pulping stage, pulping is carried out through a pulping system, and slaked lime powder is transported to a slaked lime pulping powder bin 3 by a sealed tank car for temporary storage; during pulping, adding slaked lime powder in a slaked lime pulping powder bin 3 and leachate concentrated water into a lime slurry preparation tank, and mixing and stirring to prepare slaked lime slurry with the concentration of 10-20%; after stirring and mixing evenly, conveying the slaked lime slurry to a substantial slurry storage tank for storage for later use;

s3, in a flue gas treatment stage, mixing and reacting the high-temperature flue gas and the slaked lime slurry through a reaction system; the slaked lime slurry pump 6 conveys the slaked lime slurry into the rotary atomizer 1 rotating at high speed, the rotating speed of the atomizer is 13500rpm, the slurry is extended into a film or pulled into filaments under the action of centrifugal force, the film or the filaments are broken and dispersed into droplets at the edge of an atomizing disc of the rotary atomizer 1, and the atomizing particle size is between 20 and 50 mu m;

the atomized liquid drops are led into a reaction tower 2, so that the atomized liquid drops are in contact with high-temperature flue gas, the high-temperature flue gas is cooled, the penetration rate liquid in the atomized liquid drops is completely evaporated by heating, and solid particles are formed and mixed in the flue gas to form mixed flue gas; acidic substances in the flue gas are neutralized and removed by the atomized liquid drops;

spraying the percolate into the reaction tower 2 according to the temperature of the flue gas reaction, adjusting the temperature in the reaction tower 2, and simultaneously directly evaporating a part of percolate;

s4, an absorption stage; the mixed flue gas is mixed and contacted with slaked lime powder and activated carbon powder through an absorbent injection system, the slaked lime powder can absorb and neutralize acid pollutants possibly existing in the flue pipe 21, and the activated carbon powder can absorb pollutants such as peculiar smell, small particle impurities and dust in the flue gas and attach and absorb the pollutants on the activated powder, so that subsequent cloth bag dust removal is facilitated;

the active carbon has a larger specific surface area, and pollutants and slaked lime powder can be adsorbed on the surfaces of active carbon particles during spray adsorption, so that the pollutants in the slaked lime powder and flue gas can have a larger and more stable contact reaction area, the adsorption and neutralization of the slaked lime powder on impurities such as acid pollutants in the pollutants are improved, and the effect of accelerating the reaction absorption efficiency is achieved;

and S5, in the dust removal stage, the mixed flue gas is subjected to dust removal through a bag-type dust remover 9 in a dust removal system, particulate matter impurities in the mixed flue gas are captured, relatively clean flue gas tail gas is formed, and the flue gas tail gas is finally discharged through a chimney 17.

Compared with the existing percolate concentrated water treatment technology, the method reduces the discharge of the whole waste water, applies percolate concentrated solution to a subsequent flue gas purification treatment system of a waste incineration power plant, achieves the zero discharge of the whole waste water of the waste incineration power plant, and saves the use of plant area process water. Taking the designed value of the garbage in a certain garbage incineration power plant as 1000t/d for example, about 40% of leachate is generated in the whole plant, about 400t/d, leachate concentrated water is generated after the leachate concentrated water passes through a leachate wastewater treatment system, the leachate concentrated water is 60t/d, the part of wastewater is completely and comprehensively utilized, 60t of wastewater discharge can be reduced every day, and accordingly 60t of process water is saved every day.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A waste water zero discharge system of a whole plant of a waste incineration power plant is characterized by comprising a leachate storage system, a pulping system, a reaction system and a dust removal system; a percolate storage tank (7) comprised by the percolate storage system; the pulping system comprises a pulp storage tank (5); the reaction system comprises a reaction tower (2) and a rotary atomizer (1), the spraying end of the rotary atomizer (1) extends into the reaction tower (2), the inlet end of the rotary atomizer (1) is connected with a slurry storage tank (5) through a slurry pipe (20), the dust removal system comprises a bag-type dust remover (9), and the inlet end of the bag-type dust remover (9) is communicated with the flue gas outlet of the reaction tower (2) through a flue pipe (21);

the device also comprises two groups of absorbent injection systems, wherein the two groups of absorbent injection systems are both communicated with the smoke pipe (21) and are respectively used for injecting the activated carbon and the slaked lime into the smoke pipe (21); the two groups of absorbent injection systems respectively comprise an injection device, an injection pipe (22), an injection fan and an injection storage bin, one end of the injection pipe (22) is connected with the smoke pipe (21), the other end of the injection pipe is connected with the injection fan, the injection device is connected into the injection pipe (22), and the injection storage bin is communicated with the injection pipe (22) through the injection device;

the injection device comprises an outer pipe (201), a necking pipe (202) and a material pipe (204), wherein the two ends of the outer pipe (201) are connected with injection pipes (22), the necking pipe (202) is of a structure with two large ends and a small middle part, the outer diameters of the two ends of the necking pipe (202) are consistent with the inner diameter of the outer pipe (201) and are arranged in the outer pipe (201), an annular injection cavity (203) is formed between the outer wall of the middle section of the necking pipe (202) and the inner wall of the outer pipe (201), and the pipe wall in the middle of the necking pipe (202) is provided with an injection hole (205); the position of the outer pipe (201) corresponding to the injection cavity (203) is connected with a material pipe (204), and the other end of the material pipe (204) is connected with an injection storage bin;

the injection device further comprises a balance pipe (206), the balance pipe (206) is installed in the outer pipe (201) through a support, one end of the balance pipe (206) extends into an inner cavity of a necking section of the necking pipe (202), the other end of the balance pipe extends towards an air inlet end of the injection fan, balance holes (207) are formed in two ends of the balance pipe (206), and a first adjusting valve (208) is arranged on the balance pipe (206); when the spraying device works, the air flow at two ends of the balance pipe (206) forms pressure difference, part of the air flow circulates through the balance pipe (206) and enters the necking pipe (202), and the balance pipe (206) in the necking pipe (202) can spray the balance air flow outwards to generate opposite impact with absorbent powder sprayed from the spray hole (205) so as to intensify contact and mixing with the powder; the middle section position of balance pipe (206) is connected branch pipe (209), and branch pipe (209) and external pressure air source UNICOM install second (200) of governing valve and carry out regulation and control to the flow of branch pipe (209) on branch pipe (209), realize carrying out pressure boost or negative pressure to the supplementary pressure in the middle of balance pipe (206) and adjust.

2. The waste incineration power plant factory waste water zero discharge system of claim 1, wherein a percolate pipe (19) is connected to the percolate storage tank (7), a percolate pumping device is arranged on the percolate pipe (19), and the percolate pumping device comprises a percolate delivery pump (8).

3. The waste water zero discharge system of the whole plant of the waste incineration power plant according to claim 1, characterized in that the pulping system further comprises a pulping powder bin (3) and a pulping tank (4), the pulping tank (4) is communicated with a percolate storage tank (7) through a percolate pipe (19), the pulp storage tank (5) is communicated with the pulping tank (4), the pulping tank (4) is connected with a slurry pipe (20), a lime slurry pumping device is arranged on the slurry pipe (20), the lime slurry pumping device comprises at least two lime slurry pumps (6) connected in parallel, and stirring paddles are arranged in the pulping tank (4) and the pulping tank (5).

4. The system for realizing the zero discharge of the wastewater of the whole waste incineration power plant as claimed in claim 1, wherein a flue gas inlet is formed in the top of the reaction tower (2), a flue gas outlet is formed in the lower part of the reaction tower (2), and a drain pipe is connected to the bottom of the reaction tower (2).

5. The system for zero discharge of wastewater from a whole plant of a waste incineration power plant as claimed in claim 4, wherein the atomizing rotator is arranged at the top of the reaction tower (2), the rotating speed of the rotating atomizer (1) is 13500rpm, and the atomized particle size is 20-50 μm.

6. The waste water zero discharge system of the whole plant of the waste incineration power plant as claimed in claim 4, characterized in that the inner cavity of the reaction tower (2) is provided with a spray device (18), and the spray device (18) is communicated with the percolate storage tank (7) through a percolate pipe (19).